Polyester tow twist detector

Abstract

The application relates to the polyester tow twist detection technical field and discloses a polyester tow twist detector, which comprises a fixing frame, a conveying mechanism, a first electric push rod and a limiting mechanism. The conveying mechanism is provided with two groups and is symmetrically arranged in the fixing frame. The polyester tow twist detector is provided with a camera and a limiting mechanism. The camera cooperates with an image processor to realize edge tracking of the tow. Compared with traditional visual interpretation, the detection error of the untwisting angle is reduced, and the detection repeatability is improved. The light supplement lamp ensures stable images within the illumination range, avoids environmental light interference, and integrates a pressure sensor. When the first electric push rod and the second electric push rod push down the two groups of sleeves, the limiting plates and the limiting blocks at the ends of the two groups of sliding rods contact the tow, and the pressure sensor monitors the pressure value in real time. The controller dynamically adjusts the stroke of the first electric push rod and the second electric push rod, so that the clamping force is stabilized in a proper range, and the tow is prevented from being damaged.

Description

Technical Field

[0001] This application relates to the field of polyester filament twist detection technology, specifically a polyester filament twist detector. Background Technology

[0002] Polyester fiber, commonly known as "polyester," is a synthetic fiber made from organic diacids and diols through chemical polycondensation. It belongs to the category of polymer compounds. Its invention can be traced back to the 1930s, and it is now the most important type of synthetic fiber. A filament bundle refers to a large number of continuous filaments, essentially untwisted, long bundles of chemical fibers, used to cut into short fibers or produced as chemical fiber strips through a drawing process. After spinning, chemical fibers consist of a considerable number of single filaments assembled into a filament bundle.

[0003] An existing patent (publication number: CN211856325U) discloses an intelligent yarn twist measuring device for textiles, belonging to the field of polyester filament twist detection technology. Addressing the problems of inconvenient sampling and inaccurate results from manual twisting in existing yarn twist testing methods, this invention proposes the following solution: A base plate is provided, with first support plates welded to both sides of its top. A support plate welded to the base plate is located on one side of the two first support plates that are close to each other. A push rod motor is fixedly connected to the top of the support plate, and the output shaft of the push rod motor is fixedly connected to a top plate. A pressure plate is welded to the bottom left side of the top plate, and a drive motor is fixedly connected to the bottom right side of the top plate. A gear is fixedly fitted onto the output shaft of the drive motor, and a fixing plate welded to the first support plates is located below the gear. This invention facilitates convenient sampling and testing of yarn during production, and prevents yarn slippage during testing, ensuring clear visibility of yarn rotation, thereby improving the accuracy of the test results.

[0004] While the devices described in the aforementioned comparative documents can improve the accuracy of test results, their manual untwisting operation is subject to subjective errors, has poor repeatability, and improper control of clamping pressure can easily damage the yarn bundle, affecting the reliability of the test. Existing automated equipment, although capable of clamping and rotating, lacks dynamic monitoring of the untwisting process and precise control of clamping force, resulting in incomplete data acquisition and the risk of yarn breakage. Therefore, there is an urgent need for a testing device integrating intelligent sensing and machine vision. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a polyester filament twist tester, which features non-destructive testing and high-precision online twist analysis.

[0006] To achieve the above objectives, this application provides the following technical solution: a polyester filament twist tester, comprising a fixed frame, a conveying mechanism, a first electric push rod, and a limiting mechanism. The conveying mechanism has two sets, symmetrically arranged inside the fixed frame. The first electric push rod is located at the upper end of the left side of the conveying mechanism, and a limiting mechanism is located at the lower end of the first electric push rod. A limiting plate is located at the lower end of the limiting mechanism. A rotating mechanism is located inside the fixed frame. There are two sets of limiting mechanisms; the other set is located inside the rotating mechanism, and a second electric push rod is located inside the rotating mechanism. A first L-shaped fixing plate is located at the upper end of the fixed frame, and a camera is located at the lower end of the first L-shaped fixing plate. A controller is located at the upper end of the first L-shaped fixing plate. Pressure sensors are located inside both sets of limiting mechanisms. The pressure sensors, the first electric push rod, the second electric push rod, and the camera are all electrically connected to the controller.

[0007] The above solution, through the installation of a camera and a limiting mechanism, allows for edge tracking of the yarn bundle in conjunction with an image processor. Compared to traditional visual interpretation, this reduces the error in untwisting angle detection and improves repeatability. A ring-shaped supplementary light ensures stable images within the illumination range, avoiding ambient light interference. The limiting mechanism integrates a pressure sensor; when the first and second electric push rods push the two sets of sleeves downwards, the pressure sensor monitors the pressure value in real time after the limiting plates and blocks at the ends of the two sets of slide rods contact the yarn bundle. The controller dynamically adjusts the stroke of the first and second electric push rods to stabilize the clamping force within a suitable range, preventing damage to the yarn bundle.

[0008] Furthermore, the controller is equipped with an image processor, which has a built-in convolutional neural network model for recognizing the edge contour of the polyester filament bundle and calculating the fiber separation angle.

[0009] The above solution, in conjunction with the image processor, enables filament edge tracking.

[0010] Furthermore, a second L-shaped fixing plate is provided on the upper surface of the left end of the fixing frame, the first electric push rod is fixedly connected to the lower surface of the second L-shaped fixing plate, the limiting mechanism includes a sleeve, the left end of the sleeve is fixedly connected to the lower end of the first electric push rod, a transmission chamber is opened inside the sleeve, the pressure sensor is set inside the transmission chamber, a slide rod is movably connected inside the transmission chamber, a spring is sleeved on the lower surface of the slide rod, the upper end of the spring is fixedly connected to the lower surface of the sleeve, and the limiting plate is fixedly connected to the lower end of the left end of the slide rod.

[0011] The above solution ensures axial movement accuracy by using a clearance fit between the slide rod and the sleeve.

[0012] Furthermore, a third L-shaped fixing plate is fixedly connected to the right side of the fixed frame. The rotating mechanism includes a fixing ring, which is fixedly connected to the upper end of the third L-shaped fixing plate. A rotating ring is rotatably connected inside the fixing ring. A connecting rod is fixedly connected to the side of the rotating ring. A first gear is fixedly connected to the end of the connecting rod away from the rotating ring. A second electric push rod is fixedly connected inside the first gear. The right-end sleeve is fixedly connected to the lower end of the second electric push rod. A limit block is fixedly connected to the lower end of the right-end slide rod. A fixing block is fixedly connected to the lower surface inside the first gear. A limit groove is formed on the upper surface of the fixing block. The limit block and the limit groove cooperate with each other.

[0013] The above solution, along with the spring, can attenuate the impact force.

[0014] Furthermore, a forward and reverse motor is fixedly connected to the right end of the upper surface of the first L-shaped fixing plate, and a second gear is fixedly connected to the output end of the forward and reverse motor, with the first gear and the second gear meshing with each other.

[0015] With the above scheme, the forward and reverse motors drive the second gear, which in turn drives the first gear to rotate. The connecting rod drives the rotating ring to rotate within the fixed ring, and the limiting block and the limiting groove move synchronously.

[0016] Furthermore, the upper surface of the conveying roller of the conveying mechanism is arranged parallel to the lowest end of the limiting groove.

[0017] The above method can eliminate the bending stress of the filament bundle by setting them in parallel.

[0018] Furthermore, the camera axis is perpendicular to the direction of the filament bundle, and a support frame is fixedly connected inside the fixing frame, with the first L-shaped fixing plate fixedly connected to the upper end of the support frame.

[0019] By employing the above method, image distortion can be eliminated by aligning the camera axis with the direction of the filament bundle.

[0020] Furthermore, a supplementary light is provided at the lower end of the first L-shaped fixing plate, and the supplementary light is positioned at the same location as the camera illumination.

[0021] The above solution provides illumination through supplementary lighting, ensuring that the camera obtains stable images within the illumination range.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] This polyester filament twist detector, equipped with a camera and a limiting mechanism, uses an image processor to track the edge of the filament bundle. Compared to traditional visual interpretation, it reduces the error in untwisting angle detection and improves repeatability. A supplementary light ensures stable images within the illumination range, avoiding ambient light interference. The limiting mechanism integrates a pressure sensor; when the first and second electric push rods push down the two sets of sleeves, the limiting plates and blocks at the ends of the two sets of slide rods contact the filament bundle, and the pressure sensor monitors the pressure value in real time. The controller dynamically adjusts the stroke of the first and second electric push rods to stabilize the clamping force within a suitable range, preventing damage to the filament bundle. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present application.

[0025] Figure 2 This is a top view of the structure of this application;

[0026] Figure 3 This is a schematic diagram of the rotating mechanism of this application from the right side.

[0027] Figure 4 for Figure 3 A three-dimensional structural diagram;

[0028] Figure 5 This is a cross-sectional structural diagram of the limiting mechanism of this application.

[0029] In the picture:

[0030] 1. Fixed frame; 2. Conveying mechanism; 3. First electric push rod; 4. Limiting mechanism; 401. Sleeve; 402. Transmission chamber; 403. Pressure sensor; 404. Slide rod; 405. Spring; 5. Limiting plate; 6. Rotating mechanism; 601. First gear; 602. Second electric push rod; 603. Rotating ring; 604. Fixed ring; 605. Fixed block; 606. Limiting groove; 607. Connecting rod; 7. Controller; 8. Camera; 9. First L-shaped fixed plate; 10. Second L-shaped fixed plate; 11. Forward and reverse motor; 12. Second gear; 13. Support frame; 14. Third L-shaped fixed plate; 15. Supplementary light; 16. Limiting block. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please see Figure 1 , Figure 2 and Figure 3 The polyester filament twist detector in this embodiment includes a fixed frame 1, a conveying mechanism 2, a first electric push rod 3, and a limiting mechanism 4. The conveying mechanism 2 has two sets, which are symmetrically arranged inside the fixed frame 1. The first electric push rod 3 is located at the upper end of the left conveying mechanism 2, and the lower end of the first electric push rod 3 is provided with the limiting mechanism 4. The lower end of the limiting mechanism 4 is provided with the limiting plate 5. The fixed frame 1 is equipped with a rotating mechanism 6. There are two sets of limiting mechanisms 4. The other set is located inside the rotating mechanism 6, and the rotating mechanism 6 is equipped with a second electric push rod 602. The upper end of the fixed frame 1 is provided with a first L-shaped fixing plate 9. The lower end of the first L-shaped fixing plate 9 is provided with a camera 8. The upper end of the first L-shaped fixing plate 9 is provided with a controller 7. Both sets of limiting mechanisms 4 are equipped with pressure sensors 403. The pressure sensors 403, the first electric push rod 3, the second electric push rod 602, and the camera 8 are all electrically connected to the controller 7. By setting up the camera 8 and the limiting mechanism 4, the camera 8 can cooperate with the image processor to realize the tracking of the filament edge. Compared to traditional visual interpretation, this method reduces the error in untwisting angle detection and improves repeatability. The ring-shaped supplementary light 15 ensures stable images within the illumination range, avoiding ambient light interference. The limiting mechanism 4 integrates a pressure sensor 403. When the first electric push rod 3 and the second electric push rod 602 push the two sets of sleeves 401 downwards, the limiting plates 5 and limiting blocks 16 at the ends of the two sets of slide rods 404 contact the yarn bundle, and the pressure sensor 403 monitors the pressure value in real time. The controller 7 dynamically adjusts the stroke of the first electric push rod 3 and the second electric push rod 602 to stabilize the clamping force within a suitable range, preventing damage to the yarn bundle.

[0033] Please see Figure 1 , Figure 4 and Figure 5The controller 7 is equipped with an image processor, which has a built-in convolutional neural network model for recognizing the edge contour of the polyester filament bundle and calculating the fiber separation angle. A second L-shaped fixing plate 10 is provided on the upper left surface of the fixing frame 1. A first electric push rod 3 is fixedly connected to the lower surface of the second L-shaped fixing plate 10. The limiting mechanism 4 includes a sleeve 401. The left sleeve 401 is fixedly connected to the lower end of the first electric push rod 3. A transmission chamber 402 is provided inside the sleeve 401. A pressure sensor 403 is located inside the transmission chamber 402. A sliding rod 404 is movably connected inside the transmission chamber 402. A spring 405 is sleeved on the lower surface of the sliding rod 404. The upper end of the spring 405 is fixedly connected to the lower surface of the sleeve 401. The limiting plate 5 is fixedly connected to the lower end of the left sliding rod 404. A third L-shaped fixing plate 14 is fixedly connected to the right side inside the fixing frame 1. The rotating mechanism 6 includes a fixing ring 60. 4. The fixed ring 604 is fixedly connected to the upper end of the third L-shaped fixed plate 14. The fixed ring 604 is rotatably connected to the rotating ring 603. The rotating ring 603 is fixedly connected to the side of the rotating ring 603. The end of the connecting rod 607 away from the rotating ring 603 is fixedly connected to the first gear 601. The second electric push rod 602 is fixedly connected to the inside of the first gear 601. The right sleeve 401 is fixedly connected to the lower end of the second electric push rod 602. The lower end of the right slide rod 404 is fixedly connected to the limit block 16. The lower surface of the inside of the first gear 601 is fixedly connected to the fixed block 605. The upper surface of the fixed block 605 is provided with the limit groove 606. The limit block 16 and the limit groove 606 cooperate with each other. The camera 8 cooperates with the image processor to realize the tracking of the filament edge. The slide rod 404 and the sleeve 401 are fitted with a clearance to ensure the axial movement accuracy. At the same time, the spring 405 can attenuate the impact force.

[0034] Please see Figure 1 , Figure 4 and Figure 5 A forward and reverse motor 11 is fixedly connected to the right end of the upper surface of the first L-shaped fixing plate 9. A second gear 12 is fixedly connected to the output end of the forward and reverse motor 11. The first gear 601 and the second gear 12 mesh with each other. The upper surface of the conveying roller of the conveying mechanism 2 is parallel to the lower end of the limiting groove 606. The axis of the camera 8 is perpendicular to the direction of the filament bundle. A support frame 13 is fixedly connected inside the fixing frame 1. The first L-shaped fixing plate 9 is fixedly connected to the upper end of the support frame 13. A supplementary light 15 is set at the lower end of the first L-shaped fixing plate 9. The supplementary light 15 is at the same position as the camera 8. The forward and reverse motor 11 drives the second gear 12, which in turn drives the first gear 601 to rotate. The connecting rod 607 drives the rotating ring 603 to rotate within the fixing ring 604. The limiting block 16 and the limiting groove 606 move synchronously. The parallel arrangement can eliminate the bending stress of the filament bundle. The axis of the camera 8 is perpendicular to the direction of the filament bundle, which can eliminate image distortion. The supplementary light 15 provides illumination to ensure that the camera 8 obtains a stable image within the illumination range.

[0035] In this embodiment, by setting up a camera 8 and a limiting mechanism 4, the camera 8, in conjunction with an image processor, can achieve edge tracking of the filament bundle. Compared with traditional visual interpretation, this reduces the error in untwisting angle detection and improves detection repeatability. The supplementary lighting 15 ensures stable images within the illumination range, avoiding ambient light interference. The limiting mechanism 4 integrates a pressure sensor 403. When the first electric push rod 3 and the second electric push rod 602 push the two sets of sleeves 401 downwards, the limiting plates 5 and limiting blocks 16 at the ends of the two sets of slide rods 404 contact the filament bundle, and the pressure sensor 403 monitors the pressure value in real time. The controller 7 dynamically adjusts the stroke of the first electric push rod 3 and the second electric push rod 602 to stabilize the clamping force within a suitable range, preventing damage to the filament bundle.

[0036] The working principle of the above embodiment is as follows: When the front end of the filament reaches the position of the limiting groove 606 through the conveying mechanism 2, the first electric push rod 3 is triggered to press down, driving the left end limiting plate 5 to complete the initial clamping and positioning. When the limiting plate 5 contacts the surface of the filament, the slide rod 404 is retracted upward by the reaction force of the filament, the compression spring 405 generates buffer, and the pressure sensor 403 collects the contact pressure in real time and feeds it back to the controller 7; the controller 7 dynamically adjusts the stroke of the first electric push rod 3 to stabilize the clamping force at a suitable level, while the second electric push rod 606... 2. The right end sleeve 401 is pressed down synchronously to complete the clamping. The forward and reverse motors 11 drive the second gear 12, which in turn drives the first gear 601 to rotate. The connecting rod 607 drives the rotating ring 603 to rotate within the fixed ring 604. The limiting block 16 and the limiting groove 606 move synchronously. The second electric push rod 602 dynamically compensates for axial displacement during rotation to maintain constant yarn tension. The supplementary light 15 provides illumination to ensure that the camera 8 obtains a stable image within the illumination range. The camera 8, in conjunction with the image processor, can achieve yarn edge tracking. Compared with traditional visual interpretation, the error in untwisting angle detection is reduced, and the repeatability of detection is improved.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0038] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polyester filament twist tester, comprising a fixed frame (1), a conveying mechanism (2), a first electric push rod (3), and a limiting mechanism (4), characterized in that: The conveying mechanism (2) is provided in two sets and is symmetrically arranged inside the fixed frame (1). The first electric push rod (3) is located on the upper end of the conveying mechanism (2) on the left side. The lower end of the first electric push rod (3) is provided with a limiting mechanism (4). The lower end of the limiting mechanism (4) is provided with a limiting plate (5). The fixed frame (1) is provided with a rotating mechanism (6). There are two sets of the limiting mechanism (4). The other set is located inside the rotating mechanism (6). The rotating mechanism (6) is provided with a second electric push rod (602). The upper end of the fixed frame (1) is provided with a first L-shaped fixing plate (9). The lower end of the first L-shaped fixing plate (9) is provided with a camera (8). The upper end of the first L-shaped fixing plate (9) is provided with a controller (7). Both sets of the limiting mechanisms (4) are provided with pressure sensors (403). The pressure sensors (403), the first electric push rod (3), the second electric push rod (602) and the camera (8) are all electrically connected to the controller (7).

2. The polyester filament twist tester according to claim 1, characterized in that: The controller (7) is equipped with an image processor, and the image processor has a built-in convolutional neural network model for recognizing the edge contour of the polyester filament bundle and calculating the fiber separation angle.

3. The polyester filament twist tester according to claim 1, characterized in that: The upper surface of the left end of the fixed frame (1) is provided with a second L-shaped fixed plate (10). The first electric push rod (3) is fixedly connected to the lower surface of the second L-shaped fixed plate (10). The limiting mechanism (4) includes a sleeve (401). The left end of the sleeve (401) is fixedly connected to the lower end of the first electric push rod (3). The sleeve (401) is provided with a transmission chamber (402). The pressure sensor (403) is located inside the transmission chamber (402). The transmission chamber (402) is movably connected with a slide rod (404). A spring (405) is sleeved on the lower surface of the slide rod (404). The upper end of the spring (405) is fixedly connected to the lower surface of the sleeve (401). The limiting plate (5) is fixedly connected to the lower end of the slide rod (404) on the left end.

4. The polyester filament twist tester according to claim 3, characterized in that: The fixing frame (1) has a third L-shaped fixing plate (14) fixedly connected to the right side inside. The rotating mechanism (6) includes a fixing ring (604), which is fixedly connected to the upper end of the third L-shaped fixing plate (14). A rotating ring (603) is rotatably connected inside the fixing ring (604). A connecting rod (607) is fixedly connected to the side of the rotating ring (603). A first gear (601) is fixedly connected to the end of the connecting rod (607) away from the rotating ring (603). The second electric push rod (602) is fixedly connected inside the first gear (601). The right sleeve (401) is fixedly connected to the lower end of the second electric push rod (602). The lower end of the right slide rod (404) is fixedly connected to a limiting block (16). A fixing block (605) is fixedly connected to the lower surface inside the first gear (601). A limiting groove (606) is opened on the upper surface of the fixing block (605). The limiting block (16) and the limiting groove (606) cooperate with each other.

5. The polyester filament twist tester according to claim 4, characterized in that: A forward and reverse motor (11) is fixedly connected to the right end of the upper surface of the first L-shaped fixing plate (9), and a second gear (12) is fixedly connected to the output end of the forward and reverse motor (11). The first gear (601) and the second gear (12) mesh with each other.

6. The polyester filament twist tester according to claim 5, characterized in that: The upper surface of the conveying roller of the conveying mechanism (2) is parallel to the lowermost end of the limiting groove (606).

7. The polyester filament twist tester according to claim 1, characterized in that: The axis of the camera (8) is perpendicular to the direction of the filament bundle. A support frame (13) is fixedly connected inside the fixing frame (1). The first L-shaped fixing plate (9) is fixedly connected to the upper end of the support frame (13).

8. The polyester filament twist tester according to claim 7, characterized in that: The lower end of the first L-shaped fixing plate (9) is provided with a supplementary light (15), and the supplementary light (15) is in the same position as the camera (8).

Images